P.R. Laws tit. 31, § 3176
2019-02-20 00:00:00+00
A person having several debts of the same kind in favor of a single creditor may declare, at the time of making a payment, to which of them it is to be applied.
If the debtor should accept a receipt from the creditor, setting forth the application of the payment, he cannot make a claim against it, unless there should be some cause which may invalidate the contract.
History —Civil Code, 1930, § 1126.